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 Input signal operation
• During emergency drive operation in the fixed frequency mode or in the PID control mode, input signals unrelated to the
emergency drive become invalid with some exceptions.
• The following table shows functions of the signals that do not become invalid during emergency drive operation in the fixed
frequency mode or in the PID control mode.
Input signal status
Valid
Held
Always-ON
 Emergency drive status monitor
• Set "68" in Pr.52, Pr.774 to Pr.776, Pr.992 to monitor the status of the emergency drive on the operation panel.
• Description of the status monitor
Operation
panel
Emergency drive setting
indication
Emergency drive function
0
setting is not available.
1
2
3
Electronic bypass during
emergency drive operation is
4
disabled.
5
11
12
13
14
Electronic bypass during
emergency drive operation is
15
enabled.
*1
2[]
*1
3[]
*1
4[]
*1
The first digit remains the same as the previous numerical value (fault condition).
NOTE
• When the "retry" (Pr.523 = "2[][], 3[][]") is selected, it is recommended to use the automatic restart after instantaneous power
failure function at the same time.
• Parameter setting is not available during emergency drive operation.
• To return to the normal operation during emergency drive operation, do the following.
(The operation will not be returned to normal only by turning OFF the X84 signal.)
Reset the inverter, or turn the power supply OFF.
Clear a fault by turning ON the X51 signal while the sequence function is enabled (when the protective function is activated).
• The operation is switched over to the commercial power supply operation in case of the following during emergency drive
operation.
24 V external power supply operation, power failure status or operation with the power supplied through R1/S1, undervoltage
• While the electronic bypass sequence is set or when the operation is performed with the power supplied through R1/S1, when
Pr.30 = "2", the emergency drive function is disabled.
270
5. PARAMETERS
5.7 (H) Protective function parameter
Fixed frequency mode
OH, TRG, TRC, X51, RES, X70, X71
RT, X18, SQ, X84
During normal operation
Emergency drive in operation
During normal operation
Emergency drive in operation
Electronic bypass is started during emergency drive (during acceleration/deceleration to the
switchover frequency).
During electronic bypass during emergency drive (waiting during the interlock time).
During commercial power supply operation during emergency drive
PID control mode
OH, TRG, TRC, X51, RES, X70, X71
RT, X18, SQ, X64, X65, X66, X67,
X79, X84
X14, X77, X78, X80
Description
Emergency drive operating status
Operating properly
A certain alarm is occurring.
A critical fault is occurring. The operation is being
continued by the retry.
A critical fault is occurring. The continuous operation is
not allowed due to output shutoff.
Operating properly
A certain alarm is occurring.
A critical fault is occurring. The operation is being
continued by the retry.
A critical fault is occurring. The continuous operation is
not allowed due to output shutoff.

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